Basic Concepts in the Treatment of Tibial Avulsion Fracture of the Posterior Cruciate Ligament

Abstract

The tibia, the main load-bearing bone of the knee joint, widens at its proximal end to form the medial and lateral condyles. There is a depression on the posterior side of the proximal tibia between the two condyles, which is the continuation of the posterior slope of the tibial intercondylar eminence, extending posteriorly and distally to 1–1.5 cm beyond the tibial plateau (below) and then connecting the proximal posterior tibial cortex to the anterior and distal direction. The recess is the attachment position of the posterior cruciate ligament (PCL). Due to the closure of the posterior capsule of the knee joint, a portion of the PCL tibial insertion is located outside the joint. Just above (proximal to) the insertion point is the posterior septum, which provides abundant blood supply to the PCL.